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Richard Kilvington\'s Quaestiones super libros Physicorum. A Critical Edition with an Introduction

Elżbieta Jung

In the late Middle Ages, natural philosophy focused primarily on the analysis of Aristotle's works, along with Averroes' commentaries. Among other works, Aristotle's Physics was taught at universities, and commentaries on it were the result of such classes. The present book is the result of the lectures of Richard Kilvington (ca. 1302-1361), one of the founders of the so-called School of Oxford Calculators, English scholars active in the mid-14th century. The volume contains a critical edition of Richard Kilvington's Questions on the Physics from Latin manuscripts, provided with footnotes referring to the sources used by Kilvington, as well as to the works of his contemporaries. The edition is preceded by an introduction presenting the arguments for the reconstruction of this commentary and the history of the manuscripts containing Kilvington's questions. This extensive commentary, which the author reconstructed on the basis of manuscript evidence, consists of eight so-called disputed questions. Kilvington discusses almost all the topics covered by Aristotle in his works on natural philosophy and the theory of knowledge, and logical considerations also occupy a considerable space. Kilvington is mainly interested in issues related to: the formation of complex material bodies, which occurs primarily in the process of mixing, the problem of describing the rules of local motion, and the conditions that determine such motion, i.e. the concepts of time, space, and vacuum. Kilvington's commentary is an original, sometimes innovative interpretation of the theories of Aristotle and Averroes. It was quoted many times and was an inspiration for contemporary and later thinkers. The research achievements of these thinkers contributed to the development of modern natural philosophy.

4282
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Python Object-Oriented Programming. Learn how and when to apply OOP principles to build scalable and maintainable Python applications - Fifth Edition

Steven F. Lott, Dusty Phillips

Learn to write effective, maintainable, and scalable Python applications by mastering object-oriented programming with this updated fifth edition. Whether you’re transitioning from scripting to structured development or refining your OOP skills, this book offers a clear, practical path forward.You’ll explore Python’s approach to OOP, from class creation and inheritance to polymorphism and abstraction, while discovering how to make smarter decisions about when and how to use these tools. You’ll apply what you learn through hands-on examples and exercises.Updated for Python 3.13, this edition simplifies complex topics such as abstract base classes, testing with unittest and pytest, and async programming with asyncio. It introduces a new chapter on Python’s type hinting ecosystem—crucial for modern Python development.Written by long-time Python experts Steven Lott and Dusty Phillips, this edition emphasizes clarity, testability, and professional software engineering practices. It helps you move beyond scripting to building well-structured, production-ready Python systems.By the end of this book, you’ll be confident in applying OOP principles, design patterns, type hints, and concurrency tools to create robust and maintainable Python applications.

4283
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Mastering QuickBooks 2026. The complete guide to small business accounting with US QuickBooks Online - Seventh Edition

Crystalynn Shelton

Unlock smarter, faster, and more confident bookkeeping with the new edition of the bestselling Mastering QuickBooks series – the most comprehensive guide to US QuickBooks Online. Written for small business owners, bookkeepers, accountants, and ProAdvisors, it takes you from setup and fundamentals through advanced workflows, real-world case studies, and Intuit’s newest AI-powered tools.You’ll learn how to automate invoices, payments, and expense tracking with AI Agents, and how to use Intuit Assist for reconciliations, cash flow analysis, and forecasting. Expanded coverage of eCommerce integrations with Shopify, Amazon, and Square helps you simplify multi-channel sales, while updated payroll, inventory, and compliance chapters ensure you stay aligned with the latest regulations. Three in-depth case studies – retail, services, and property management show QuickBooks in action, making it easy to apply your learning to real businesses. Whether you’re new to QuickBooks or a seasoned professional, this edition will help you save time, reduce errors, and make smarter financial decisions with confidence.